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Online Data: Standard VGPM

1080 by 2160 Monthly HDF files from MODIS 1.1 Data

To get these data, please click on the file name(s) that you have selected and save locally on your computer. The individual hdf files are gzipped (use gunzip to uncompress) and the tar files contain gzipped hdf files.

different grid size, timestep, or format?

[Note: ancillary input data are available here for those who are interested]

Data Selection

You can either download annual tar files with the data we have for each year, or you can access the individual monthly files at the end of this page.

Annual Tar Files

vgpm.2002.tar • 2002 data; ~ 25 MB of compressed data
vgpm.2003.tar • 2003 data; ~ 50 MB of compressed data
vgpm.2004.tar • 2004 data; ~ 50 MB of compressed data
vgpm.2005.tar • 2005 data; ~ 50 MB of compressed data
vgpm.2006.tar • 2006 data; ~ 50 MB of compressed data
vgpm.2007.tar • 2007 data; ~ 50 MB of compressed data
no 2008 files • 2008 data: no complete months; see 8day files

hdf file naming convention

vgpm.yyyyddd.hdf.gz

vgpm = net primary production (units of mg C / m**2 / day) based on the standard vgpm algorithm
yyyy = year
ddd= day of year of the start of each monthly file
hdf = file type
gz = compressed with gzip (uncompress with gunzip)

The hdf files have metadata contained within them, which can be examined, for example, with program "ncdump".

npp is based on the standard vgpm, using modis chl, modis sst4, and seawifs par as input; clouds have been filled in the input data using our own gap-filling software.

For citation, please reference the original vgpm paper by Behrenfeld and Falkowski, 1997a as well as the Ocean Productivity site for the data.

Monthly Files

  2002 2003 2004 2005
  January no data vgpm.2003001 vgpm.2004001 vgpm.2005001
  February no data vgpm.2003032 vgpm.2004032 vgpm.2005032
  March no data vgpm.2003060 vgpm.2004061 vgpm.2005060
  April no data vgpm.2003091 vgpm.2004092 vgpm.2005091
  May no data vgpm.2003121 vgpm.2004122 vgpm.2005121
  June no data vgpm.2003152 vgpm.2004153 vgpm.2005152
  July vgpm.2002182 vgpm.2003182 vgpm.2004183 vgpm.2005182
  August vgpm.2002213 vgpm.2003213 vgpm.2004214 vgpm.2005213
  September vgpm.2002244 vgpm.2003244 vgpm.2004245 vgpm.2005244
  October vgpm.2002274 vgpm.2003274 vgpm.2004275 vgpm.2005274
  November vgpm.2002305 vgpm.2003305 vgpm.2004306 vgpm.2005305
  December vgpm.2002335 vgpm.2003335 vgpm.2004336 vgpm.2005335

  2006 2007 2008
  January vgpm.2006001 vgpm.2007001 missing par
  February vgpm.2006032 vgpm.2007032 missing par
  March vgpm.2006060 vgpm.2007060 missing par
  April vgpm.2006091 vgpm.2007091 partial par
  May vgpm.2006121 vgpm.2007121 partial par
  June vgpm.2006152 vgpm.2007152 partial par
  July vgpm.2006182 vgpm.2007182 missing par
  August vgpm.2006213 vgpm.2007213 missing par
  September vgpm.2006244 vgpm.2007244 missing par
  October vgpm.2006274 vgpm.2007274 missing par
  November vgpm.2006305 vgpm.2007305 not ready
  December vgpm.2006335 vgpm.2007335 not ready


Last modified: 09 October 2009
by:  Robert O'Malley
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